CN208421288U - Photovoltaic reflective membrane - Google Patents
Photovoltaic reflective membrane Download PDFInfo
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- CN208421288U CN208421288U CN201721893168.5U CN201721893168U CN208421288U CN 208421288 U CN208421288 U CN 208421288U CN 201721893168 U CN201721893168 U CN 201721893168U CN 208421288 U CN208421288 U CN 208421288U
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Abstract
The utility model relates to reflective technical field of membrane, more particularly to a kind of photovoltaic reflective membrane, reflective layer, microstructured layers, substrate layer and the adhesive layer set including successively layer, microstructured layers are made of multiple prism elements, the angled setting of the extending direction of two neighboring prism elements.The photovoltaic reflective membrane of the utility model can increase reflective surface area and improve the solar energy utilization ratio under different solar incident angle degree.
Description
Technical field
The utility model relates to reflective technical field of membrane, and in particular to a kind of photovoltaic reflective membrane.
Background technique
Photovoltaic is environmentally protective, non-environmental-pollution, and is renewable resource, in the situation of current energy shortage
Under, photovoltaic is a kind of new energy for having broad based growth future.
Currently used photovoltaic module is a kind of semiconductor devices that the luminous energy of the sun is converted into electric energy, market
Majority forms a complete electric path for each single battery piece is connected using welding.
Since welding surface is smooth tinning layer, sunlight exposes to welding surface after total reflection, can not continue
It utilizes, causes the reduction of sun light utilization efficiency.Its area coverage accounts for about 3%~4% or so of entire cell area, is equivalent to loss
3%~4% output power of entire Solar use.
Currently, now there are mainly two types of solutions in order to by the significantly more efficient utilization of the sunlight at welding position: the first
To prepare special reflective solder strip, by processing vee-cut on welding surface, and the anti-of high reflectivity energy is formed in flute surfaces
Photosphere reuses reflection source, to improve the utilization rate of incident light.But there are processing difficulties for this welding, use
Inconvenient, the problems such as scolding tin is at high cost.Second is simple reflective membrane, and pasting one on every welding surface has triangular prism knot
The reflective membrane of structure, structure crest line is along welding length direction, but this kind of reflective strip structure is simple, low efficiency, reflects light area
Limited, some light reflexes to except photovoltaic cell.Under different angle of incidence of sunlight degree, it is difficult to obtain maximum conversion efficiency.
Utility model content
The purpose of the utility model is to provide a kind of photovoltaic reflective membranes, can increase reflective surface area and improve the different sun
Solar energy utilization ratio under incident angle.
To achieve the above object, the technical scheme adopted by the utility model is a kind of photovoltaic reflective membrane, including successively
Reflective layer, microstructured layers, substrate layer and the adhesive layer that layer is set, microstructured layers are made of multiple prism elements, two neighboring prism
The angled setting of the extending direction of unit.
Preferably, the extending direction angle of two neighboring prism elements is α, 0 180 ° of < α <.
Preferably, α is 90 °.
Preferably, two neighboring prism elements are V-shaped, and the high H of V-structure is 250-1000 μm, between two V-structures
Distance D is 500-2000 μm.
Preferably, prism elements are made of multiple triangular prism arrangements disposed in parallel.
Preferably, the cross section of the triangular prism is in isosceles triangle, and the corner angle of the isosceles triangle is 60-
145°。
Preferably, the distance of two neighboring triangular prism is 15-300 μm in each prism elements, a height of 10- of triangular prism
500μm。
Preferably, in each prism elements triangular prism height with a high N it is low be to be recycled in a period, and N >=0 is high
Triangular prism and the height ratio of low triangular prism be 1:0.6-1.
Preferably, the apex angle of the isosceles triangle is arc chord angle or is cut off by straight line or wave, isosceles triangle
When apex angle is arc chord angle, the radius of arc chord angle is R, 0.5 5 μm of < R <；The apex angle of isosceles triangle is cut off by straight line or wave
When, section width is L, 0.5 5 μm of < L <.
After adopting the above technical scheme, the utility model has the positive effect that:
The reflective membrane of the utility model preparation is used by the way that microstructured layers are arranged to the prism elements that multiple angles are arranged
When, the light source of different direction of illuminations can reflex to cell piece around, and so that general components is applicable in the area of different direction of illuminations,
The structure light that the relatively conventional non-prism elements by angled setting form has gain according to power, it is possible to reduce outside reflection photovoltaic glass
Light, increase reflective surface area, improve the solar energy utilization ratio under different solar incident angle degree.
Detailed description of the invention
Fig. 1 is the reflective membrane structure diagram of photovoltaic in embodiment 1；
Fig. 2 is photovoltaic reflective membrane schematic cross-section in embodiment 1.
Wherein: 1, substrate layer, 2, adhesive layer, 3, microstructured layers, 4, reflective layer.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms should broadly understood, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
Embodiment 1
1. as shown in Figs. 1-2, be the photovoltaic reflective membrane of the present embodiment, including successively layer is set from top to down reflective layer 1,
Microstructured layers 2, substrate layer 3 and adhesive layer 4.
Microstructured layers 2 are made of multiple prism elements 2-1, and the extending direction of two neighboring prism elements 2-1 is angled to be set
It sets, i.e., microstructured layers 2 are moved towards by prism elements 2-1 in W sigmoid.The extending direction angle of two neighboring prism elements 2-1 is
The curved angle of α, i.e. W, wherein 0 180 ° of < α <, it is preferred that α is 90 °.Two neighboring prism elements 2-1 is V-shaped, V-structure
High H be 250-1000 μm, the distance D between two V-structures is 500-2000 μm.
Prism elements 2-1 is made of multiple triangular prism arrangements disposed in parallel.The cross section of the triangular prism is in isosceles three
Angular, the corner angle of the isosceles triangle is 60-145 °, and optimized angle is 110-130 °, and optimal angle is 120 °.It is described
The apex angle of isosceles triangle is arc chord angle or is cut off by straight line or wave, when the apex angle of isosceles triangle is arc chord angle, circular arc
The radius at angle is R, 0.5 5 μm of < R <；When the apex angle of isosceles triangle is cut off by straight line or wave, section width is L, 0.5 < L
5 μm of <.In each prism elements 2-1 the distance of two neighboring triangular prism be 15-300 μm, a height of 10-500 μm of triangular prism, three
The height of prism with a high N it is low be to be recycled in a period, the height ratio of and N >=0, high triangular prism and low triangular prism is 1:
0.6-1, in the present embodiment, the height of triangular prism with 1 high 1 it is low be a loop cycle, it will be understood that can also with it is 1 high 2 low, 1
High 3 modes such as low recycle.
Reflective layer 1 is with a thickness of 0.01-50 μm, and preferably 0.1-1 μm, by passing through such as metal material, inorganic material
It learns the methods of plating, vapor deposition, spraying plating to be made, the reflectivity of reflective layer 1 reaches 80% or more.2 material of microstructured layers is acrylic acid tree
Rouge is solidified to obtain by macromolecule resin by heat cure or UV.Substrate layer 3 has excellent flexible, portability, wherein being preferably
Polycarbonate, poly terephthalic acid binaryglycol ester, polyamide, polystyrene, polyethylene, polymethyl methacrylate etc.
Film.Adhesive layer 4 is with a thickness of 15~50um, wherein preferably 20~25um.Its material is polyurethane TPU, vinyl acetate is copolymerized
Object EVA, copolyamide Co-PA, copolyesters Co-PES etc., reflective membrane is affixed to welding surface by adhesive layer 4.
2. above-mentioned reflective membrane the preparation method is as follows:
(I) ultraprecise mold corresponding with microstructured layers, material used in mold are made using ultraprecise engraving machine first
For copper or Ni-based material.With ultraprecise coating machine, in die surface acrylic resins of painting, solidified by UV or the side of heat cure
Microstructured layers 2 are transferred on substrate layer 3 by method, and solidification obtains microstructured layers 2；
(II) mirror surface i.e. reflective layer is prepared on microstructured layers 2 by the method for vapor deposition or spraying plating in vacuum environment
1；
(III) adhesive layer 4 is made by the method for coating or fitting in the bottom of substrate layer 3；
(IV) reflective membrane is wound by spool by winder, reflective membrane is cut into 0.5- with cutting machine when use
The strip of 2.0mm wide uses.
3. the application method of above-mentioned reflective membrane are as follows: by automatic gummer, using the residual temperature after series welding in concatenated battery
The reflective membrane cut on pasting on the positive welding of piece, reflective membrane width x length size are consistent with welding.Again in reflective membrane
Upper coating ethylene-vinyl acetate copolymer layer, places photovoltaic glass in ethylene-vinyl acetate copolymer layer.In cell piece
Lower section is coated with ethylene-vinyl acetate copolymer layer, is finally compressed on backboard.The material laid is put into laminating machine and carries out height
Warm vacuum lamination, the EVA extra to edge and backboard carry out chamfered edge after lamination, carried out after part to be laminated is cooling aluminium frame and
The installation of wire box, the volume of data such as last detection components power.
When sun light projection, incident ray can be reflected on reflective membrane, since the refractive index of photovoltaic glass is greater than
Air refraction, reflection light can be totally reflected in photovoltaic glass and Air Interface, total reflection light finally can again into
Enter cell piece to increase transfer efficiency.Because of the microstructured layers 2 that such reflective membrane has regularity height alternate, and using
When, the triangular prism of 2 the extreme side of microstructured layers is arranged to high, can effectively stop reflection source on edge cell piece to electricity
Pond piece external reflectance is further reflected back cell piece recycling, improves its transfer efficiency.It is set using microstructured layers 2 in the structure of W shape
Meter, reduces the light source for vertically reflecting glass, i.e., the light source of different direction of illuminations can reflex to cell piece around, make routine
Component can be applicable in the area of different direction of illuminations, increase the versatility of reflective membrane.
Comparative example 1
In the comparative example, the difference with embodiment 1 is only that, microstructured layers 2 are suitable by multiple triangular prisms disposed in parallel
Sequence rearranges.
Reflective membrane prepared by embodiment 1 and comparative example 1 is measured into optical energy utilization efficiency respectively, analysis is it is found that real by contrast
Apply example 1 than comparative example 1 reflective membrane its to optical energy utilization efficiency gain up to 20-30%, illustrate 1 reflective membrane of embodiment to photovoltaic benefit
More preferably with efficiency.
It will be apparent to those skilled in the art that can make various other according to the above description of the technical scheme and ideas
Corresponding change and deformation, and all these changes and deformation all should belong to the protection scope of the requires of the utility model
Within.
Claims (9)
1. a kind of photovoltaic reflective membrane, it is characterised in that: reflective layer (1), the microstructured layers (2), substrate layer set including successively layer
(3) it is made of with adhesive layer (4), microstructured layers (2) multiple prism elements (2-1), the extension of two neighboring prism elements (2-1)
The angled setting in direction.
2. photovoltaic reflective membrane according to claim 1, it is characterised in that: the extension of two neighboring prism elements (2-1)
Angular separation is α, 0 180 ° of < α <.
3. photovoltaic reflective membrane according to claim 2, it is characterised in that: α is 90 °.
4. photovoltaic reflective membrane according to claim 2, it is characterised in that: two neighboring prism elements (2-1) are V-shaped, V
The high H of type structure is 250-1000 μm, and the distance D between two V-structures is 500-2000 μm.
5. photovoltaic reflective membrane according to claim 1, it is characterised in that: prism elements (2-1) are arranged in parallel by multiple
Triangular prism arrangement composition.
6. photovoltaic reflective membrane according to claim 5, it is characterised in that: the cross section of the triangular prism is in isoceles triangle
Shape, the corner angle of the isosceles triangle are 60-145 °.
7. photovoltaic reflective membrane according to claim 6, it is characterised in that: two neighboring in each prism elements (2-1)
The distance of triangular prism is 15-300 μm, a height of 10-500 μm of triangular prism.
8. photovoltaic reflective membrane according to claim 7, it is characterised in that: triangular prism in each prism elements (2-1)
Height with a high N it is low be to be recycled in a period, the height ratio of and N >=0, high triangular prism and low triangular prism is 1:0.6-1.
9. photovoltaic reflective membrane according to claim 6, it is characterised in that: the apex angle of the isosceles triangle is arc chord angle
Or cut off by straight line or wave, when the apex angle of isosceles triangle is arc chord angle, the radius of arc chord angle is R, 0.5 5 μm of < R <；
When the apex angle of isosceles triangle is cut off by straight line or wave, section width is L, 0.5 5 μm of < L <.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721893168.5U CN208421288U (en) | 2017-12-28 | 2017-12-28 | Photovoltaic reflective membrane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721893168.5U CN208421288U (en) | 2017-12-28 | 2017-12-28 | Photovoltaic reflective membrane |
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| CN208421288U true CN208421288U (en) | 2019-01-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169829A (en) * | 2017-12-28 | 2018-06-15 | 常州华威新材料有限公司 | Photovoltaic reflective membrane and preparation method thereof |
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2017
- 2017-12-28 CN CN201721893168.5U patent/CN208421288U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169829A (en) * | 2017-12-28 | 2018-06-15 | 常州华威新材料有限公司 | Photovoltaic reflective membrane and preparation method thereof |
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